266
Step Command
Remarks
Secrecy (PFS) feature
for the IPsec policy.
dh-group5
|
dh-group14
|
dh-group19
|
dh-group20
|
dh-group24
}
•
In FIPS mode:
pfs
{
dh-group14
|
dh-group24
|
dh-group19
|
dh-group20
}
For more information about PFS,
see "
."
The security level of the
Diffie-Hellman (DH) group of the
initiator must be higher than or
equal to that of the responder.
The end without the PFS feature
performs SA negotiation
according to the PFS
requirements of the peer end.
The DH groups 19 and 20 are
available only for IKEv2.
7.
(Optional.) Enable the
Extended Sequence
Number (ESN) feature.
esn enable
[
both
]
By default, the ESN feature is
disabled.
Configuring a manual IPsec policy
In a manual IPsec policy, the parameters are configured manually, such as the keys, the SPIs, and
the IP addresses of the two ends in tunnel mode.
Configuration restrictions and guidelines
Make sure the IPsec configuration at the two ends of an IPsec tunnel meets the following
requirements:
•
The IPsec policies at the two ends must have IPsec transform sets that use the same security
protocols, security algorithms, and encapsulation mode.
•
The remote IPv4 address configured on the local end must be the same as the primary IPv4
address of the interface applied with the IPsec policy at the remote end. The remote IPv6
address configured on the local end must be the same as the first IPv6 address of the interface
applied with the IPsec policy at the remote end.
•
At each end, configure parameters for both the inbound SA and the outbound SA, and make
sure the SAs in each direction are unique: For an outbound SA, make sure its triplet (remote IP
address, security protocol, and SPI) is unique. For an inbound SA, make sure its SPI is unique.
•
The local inbound SA must use the same SPI and keys as the remote outbound SA. The same
is true of the local outbound SA and remote inbound SA.
•
The keys for the local and remote inbound and outbound SAs must be in the same format. For
example, if the local inbound SA uses a key in characters, the local outbound SA and remote
inbound and outbound SAs must use keys in characters.
Configuration procedure
To configure a manual IPsec policy:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Create a manual IPsec
policy entry and enter
its view.
ipsec
{
ipv6-policy
|
policy
}
policy-name
seq-number
manual
By default, no IPsec policy exists.
3.
(Optional.) Configure a
description for the IPsec
policy.
description text
By default, no description is configured.
